Convert Advanced Systems Format (.asf) to Audio Interchange File Format (.aiff) online for free. Fast, secure video conversion with no watermarks or registration.
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Choose your output settings. The default settings work great for most files.
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AIFF (Audio Interchange File Format) is Apple's uncompressed audio standard, storing PCM waveform data at full CD quality or higher. ASF files from Windows Media environments typically carry WMA-compressed audio. Converting ASF to AIFF decodes the compressed WMA stream and writes raw PCM samples, preserving every detail the WMA codec retained — ideal for professional audio workflows on macOS.
AIFF is the professional audio standard on Apple platforms, natively supported by Logic Pro, GarageBand, and Final Cut Pro without any codec dependencies. When you need to bring audio from a Windows Media recording into a Mac-based production pipeline, AIFF ensures zero additional quality loss from that point forward. AIFF also supports metadata chunks and loop points, making it useful for sound design.
The conversion decodes the WMA audio stream inside the ASF container to raw PCM samples, then writes them into an AIFF container with appropriate chunk headers. Sample depth is typically 16-bit or 24-bit depending on the source. Sample rates (44.1 kHz, 48 kHz, 96 kHz) are preserved. The resulting file is uncompressed and significantly larger than the source ASF.
AIFF output is lossless from the decoded WMA onwards — no additional quality is lost in the ASF to AIFF step. However, any artifacts already baked in by the original WMA compression remain. For truly lossless archival, the original recording should have used WMA Lossless inside the ASF container.
| Device | ASF | AIFF |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
ASF to AIFF conversion is the right move when you need uncompressed, macOS-native audio from Windows Media recordings for professional editing, mastering, or archival.
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| Funktion | ASF | AIFF |
|---|---|---|
| Fullstandigt namn | Advanced Systems Format | Audio Interchange File Format |
| Filandelse | .asf | .aiff |
| Bast for | Streaming optimized | Lossless quality |